Cable drum



R. H. ZEILMAN Aug. 9, 1949.

CABLE DRUM FiledMay 14, 1946 2 Sheets-Sheet 1 Patented Aug. 9, 12949 .1;

v y Roy Zeilman, Elyria, Ohio, 'assignor to The Thew Shovel Company,Lorain, Ohio,ra corv poration of Ohio .amil/1 cation Mayu, 1946,-vserial No. 669,684

i 1 u My invention relatesto animproved derricking cable drum andstorage reel mechanism therefor adapted for use in load handlingmachinery and my invention more particularly relates to a derriokingcable drum and storage reel mechanism thereforv adapted to be used tocontrol the lowering or raising ofthe boom of a load` handling crane.

The usual winding drum of the .prior artis oommonly employed to storeonly such limited amountof cable as required for most uses, and it hasbeen found to be undesirable to store` an excessamount of cable overthat needed for the more usual operations of thev boom, since theeffective diameter of they reeledcable willbe so increased as toincrease the zoable speed during winding and unwinding operations,whereby the maximum cable pullis decreased below the fre'-V eciaimsicl.2st-184)' I as economies. in manufacture,

ness maintaining a constant length of live rope and varying lengths ofxed ropesthe extended length of the xed ropes being dependent on theboom length. l Y

An object of my invention therefore is to provide the improved drum andstorage reelstruoture of my invention comprising a unitary drummechanism capable of handling allofthe cable length necessary forvarious lengths of vbooms and cable drum portion without requiring thatthe derricking be constructed otherwise than in the standard dimensions.

Another object of my invention is to vprovide in a unitarydrumstructure, winding and storage drum portions, wherein the stored cableremains unaffected during the operative movements of the drum tofwindor. unwind, thelive cable portion.

Another object of my invention resides in the provision for theVreadygfsupply of 'additional lengths of cable from the storage reel ontothe winding drum as requiredandfor the converse operation, the length oflive cableffromthe drum may be readily lessened by'transferring adesired length of normally excess and stored cablefromv the liv'e cablewinding drum to the storage reel,l

in alsimple, expeditious manner.

efciency in use, etc., are: also eieotedby my invention and will becomeincreasingly apparent'from a review of thefollowing description andattached drawings,

u in which drawings:

Fig. 1 is a sectional View of the unitary cable storage drum and'windingreel of my invention keyed to a drive shaft of ra mobile power shovel,crane, or similar mechanism;

Fig. 2 is a fragmentaryl enlarged end view taken through the lines 2--2of Fig. 1; f

Fig. 3 is a View similar to that of Fig. 2 but taken on the lines. 3.-3of Fig. 1;

Fig. 4 is a view taken on the lines 4--4 of Fig. 2;

Fig. 5 is a View taken on the line 5-5 of Fig. 2;.

Figfll vis a sectional View taken on the line D-D of Fig. 7.;

Fig. 12 is an end elevational View of the mechanismof the foregoingfigures.

Referring now to the drawings, all of which illustrate my improvedwinding drum and storage reel, in an integral unitary structure, thedrum 2 and the relatively larger storage reel 3 are relatively axiallyaligned, and the unit is also pro-L vided with a brake drum portion, thelatter being afforded'by an annular rim I0 peripherally supported upon aradial kweb I9 which extends *intermediately of the drum and reel andterminates peripherally in a substantially cylindrical flange l0, theouter surface 9` ofwhich aicrds fa brake drum surface, and is' adaptedto be engaged in the usualmanner by an embracing brake band 25. The.windingdrum 2 comprises the. drum hub- 6, an end ange 1, and a4similarly formed end flange 8, which is merged with the radial web I9,which supports the annular brake drum l0.

Thestoragev reel S'isprovided with a 'substantially cylindrical hub V4-and an end lange24, the other reel end 'flange being supplied by thebase portionbf the web I9. f A f The unitary drum mechanismrismountednonother and further objects of my invention; such the' 'drive' shaft 411;Ybythe. drum hub' 161, a key-v s 3 being preferably employed to avoidrelative rotation as between the drive shaft and the drum hub. Aplurality of interspaced reinforcing ribs 39 integrally merge with theunderside of the reel hub or web 26, with lateral surfaces of the drumflange 8 and the drum hub 6.

At 21, an aperture of the reel seat 26 is disposed closely adjacent theweb I9, near its junction with the winding drum flange 8, and at Iranother aperture is provided through the wall of the drum flange 8. Y I

'Ilhe storage reel is intended to store derricking cable whose length isin excess of that of the nor? mal working cable required-for a given'relatively short length of boom. The storage reel 3 is l'designed tocarry the excess length of cable, whenever theV length of boom hasbeen-reduced through the removal of a section and less cable istherefore required to operate the boom.

When a boom length is to be changed, preferably the boom is generallyplaced in 'a horizontal position with the outer end resting on asupport. Then if the boom is to be shortened, a section is removed andthe remaining section assembled. To take care of the resulting excess ofthe cable the cable clamp 20, whichis adjacent to the guide i6 isremoved and the excess cable is drawn through the guide and the :cableclamp reinstalled. Now, by revolving the drum so as to raise the boom,while manually holding the free end of the reserve cable taut, so as topermit it to be fed on `the reel S, the working cable is wound on thedrum and the excess cable is also, 'duringV the same operation, wound onthe cable reel. This averts the necessity for 'winding the excess cableon the reel manually, although, especially for relatively shorterlengths of excess cable, manual reeling may be resorted to.

Through the two apertures i5 and 21, the end of 'the complete continuouscable may be 4successively projected and the portion thereof intended tobe employed as a reserve length of storagecable is looped over thearcuately formed channel guide I6, Figs. 2 and 5, and then wound aroundthe storage reel 3, and when completely reeled upon said reel theextreme end of said reserve cable is anchored by clamp 23 to a laterallydisposed portion of the surface l2 of the web i9, the clamp beingsecured to said web preferably by a U-bolt 5|, Fig. 4, projected throughany of the plurality of pairs 'of apertures 22 which are disposed atintervals through the 'web i9 near the juncture of said web and thebrake drum flange l0.

During the operation of placing the end of the cable on the storage reel3 when the full length of storage cable has been drawn through theapertures l5 and 2., Fig. 8, and after looping the cable 'portion 52over the arcuate channel guide I6, a clamp 20 preferably similar to thatshown at 23 Y is employed to tightly clamp the cable to the'adjacentsurface of the web IKS.

The reserve or storage portion 4of the cable, after being wound upon thestorage .reel 3, thus has its free end 54 and also its other enddisposed adjacent the vguide l5 securely clamped to the'web I9 so thatrotation of the reel with the winding drum Ais entirely without effectupon the 'stored cable which is rigidly affixed to the web by both ends.

The cable guide I6 4is rigidly secured preferably by welding 'or in anyother vsuitable manner to the base of the web i9, adjacent to itsjuncture with the drum flange 8, being thus made integral with said web.

Figs. 2 and 3 best illustrate the manner-of prothe frame of the machine,as preferably comprisingin a single length the cable sections 53 and 54,Whose intermediate portion 52 is hooked over the curved channel-shapedguide I6.

With the guide considered as the datum point, and the cable clamp 2B inplace, each of the said cable sections are wound in the same windingdirection, respectively on the drum 2 and reel 3. Thus the saidintermediate portion 52 of the cable leading adjacent portions definewhat may be termed.v a hairpin loop, extending to the faces of therespective storage reel and Work cable drum to take positions thereon asindicated on 54 and '53, Fig. 5, and in the' view of Figs. 2, 3 and 4with the free ends of the cable portions 53 and 54 disposed at oppositesides of the separating web or wall i9, rotation in theclockwisedirection as Viewed in Fig. 2 and in the counterclockwise directionasviewed in Fig. 3, of the entire unit 'comprising both the reel 3 anddrum 2 of 'which the latter isof smallest diameter, both cable sectionsare wound on their respective reel and drum, during thesame powereffected rotation of the unit. During this same period of rotation ofthe unit drum reel andbrake, the winding of the work cable 53 willexercise a pulling force on its free end to `elevate the boom, which isthe natural result of reeling in the derricking cable. At the same timethe reserve cable is wound at a faster rate because of the greaterdiameter of the reel 3, and therefore at or before the time that theboom is fully elevated the length of reserve section of cable iscompletely wound upon said reel whereupon `rotation of the unitcomprising said reel and drum is discontinued and the brake is said tohold it stationary, whereby the end of the reserve cable is secured tothe web I2 by operative placementof the vclamps 23, Figs. Vl, 2 and 3.

Figs. 10 and 11 illustrate cross sectional Views of the channel guide'laffording a guide seat Fl for the portion of the cable, shown at 52 inFig. 2, and in the form shown in Figs. l0 and 11 the channel guide isshown as having been formed integrally Vwith the web I9 instead ofwelding a separate channel shaped piece thereto as previously related. lY

As best illustrated in these figures, 'the Vcable wraparoundear l isprovided with a relatively Wider groove il in that end of ear disposedadjacent the opening l5 than at theend of said ear IG disposed Aadjacentthe storage drum bed, although in my preferred embodiment the depthofthe groove remains the same.

The ear l5 is further curved inwardly and downwardly, as best shown inFig. 1, at its medial sectionfto conform to the contour of associatedportion EQ of the radial flange I9 Vwherefor the derricking cableisjfedonto the grooved portion l 'of the cable wraparound guide VIiiwithout an abrupt `change in'its direction.

' The Ylowermost portion of the rib Il disposed nearest the holes l-ZIis'curved as is the portion I9 to allow the cable fed thereover to thespool 3 to pass easily and without binding or hindrance. 1

The `perforation I5, as shown in Fig. 6, is preferably of shuttle shape,the small end of the opening being disposed adjacent the derricking drumbed 2 and the larger end thereof being disposed adjacent the opening 2'Iin the side wall portion of the disc.

I prefer further to so suitably dimension the cylindrical flange 8, asshown by the radials I to V, and more particularly in Fig. 9, that thetaper of the flange decreases as that portion of the flange which isprovided With the opening I5 is approached.

In order to strengthen the unitary winding drum, brake drum and storagereel structures in addition to the ribs 39, previously described, theradially extending flange or web I9 is also braced by the provision ofradial ribs I I dividing the Web I9 into a plurality of radial portionsIZ, preferably iive in number, and a radial portion I9, and in order tolighten the structure, these are provided with apertures such as theseshown at I3 which may extend from the one to the other side of the webI9, said apertures being preferably interspersed between the ribs II.

From the foregoing description it will be observed that the direction ofwinding considering both cable sections as a single length, proceedingfrom the outermost convolution of the one section to the outermostconvolution of the other section, is reversed at the junction betweenthe sections where the said intermediate portion of the cable length iswrapped around the arcuate channel-shaped flange element I6.

The reason for the reversal of winding direction is to accomplish thewinding of excess cable on the reel by power while the boom is beingraised as previously described. It is apparent that if the direction ofwinding were not reversed, the winding of rope on the reel would notoccur when raising the boom.

The use of two cable clamps serves a very dennite function, for thecable clamp adjacent to the guide passage through the flange serves toanchor the end of the Working cable. The second clamp serves to anchorthe end of the working cable after it has been wound on the storagereel.

Having thus described my invention in a particular embodiment thereof ina manner to clearly specify the construction which I prefer to thoseskilled in the art to which my invention appertains, I am aware thatnumerous and extensive departures may be made from the embodimentsdescribed herein without. however. departing from the spirit of myinvention and the scope of the appended claims.

I claim:

1. An integral metallic cable winding unit for derricking cablecomprising a pair of axially aligned, relatively contiguous, windingdrums, each provided with a cylindrical hub and a pair of drum-endlanges` the hub of a first said drum being of substantially lessdiameter than, and supporting, that of the other drum. the axially innerflange of said rst drum being apertured adiacent its outer hub surfaceand the other drum hub being apertured adjacent its axially inner flangeto provide a cable passage between the drums, an arcuate transverselychannel-shaped cable guiding channel element secured to the inner sideof the axially inner flange of said other drum and said cable passageand the channel of said guide being so disposed that an intermediateportion of cable being hooked over said guide in substantially hair-pinform whereby the cable, from one side portion of the guide, may, withoutbeing sharply bent, be directed by the guide and passage tangentially tosaid first drum hub surface, and the cable from the other side of theguide may be directed to tangentially engage the said other drum hub,whereby when said unit is rotated and the cable ends are held yieldinglytaut, opposite portions of said cable, disposed toward its respectiveends, may be concurrently wound, respectively, on the two drums.

2. The derricking cable unit substantially as set forth in claim 1,characterized by said axially inner drum-end flange of that drum whosehub is of greatest diameter, said flange having an unbroken peripheryand being provided with an an- Y nular ange extending radially to anextent which is in excess of the width of the cable guiding element.

3. 'Ihe derricking cable unit substantially as set forth in claim 1,characterized by the provision of a flange integrally secured to andaffording a peripheral portion of the recited axially inner drum endflange of that drum whose hub is of greatest diameter, said flangeprovided with an outermost brake surface adapted to be engaged `by anon-rotatable braking element to retard the speed of rotation of theunit when the cable is being withdrawn from the rst recited drum whichis of least hub-diameter.

4. The derricking cable unit substantially as set forth in claim 1characterized by the recited axially inner drum-end flange of that drumwhose hub is of greatest diameter, having an outermost circumferentiallycontinuous peripheral portion of substantially T-section in a transverseradial plane to aord a flange providing a peripheral outwardly facingbrake drum surface and the recited cable guiding element being of lesslateral extent than the relatively radially outwardly disposed portionof said brake drum flange.

5. The derricking cable unit substantially as set forth in claim 1characterized by the provision of means to removably secure the two endsof a length of cable disposed on said drum whose hub is of greatestdiameter, to drum-end flange portions of the recited drum that one ofsaid securing means being disposed closely adjacent to the said guide,and said axially inner flange having peripheral portions beingcircumferentially unbroken.

6. The derricking cable unit substantially as set forth in claim 1characterized by the axially inner drum-end :flange of that drum Whosehub is of greatest diameter having a circumferentially continuousperipheral portion.

ROY I-I. ZEILMAN.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 449,207 Cunningham Mar. 31, 1891457,798 Smith Aug. 18, 1891 933,609 Sand Nov. 2, 1909 1,192,322 JenkinsJuly 25, 1916 1,498,228 Bell June 17, 1924 1,565,720 Estes Dec. 15, 19251,784,311 Perry Dec. 9, 1930 1,836,067 Faulkner et al. Dec. 16, 1931

